{"id":"https://data.mapsnap.org/runs/v2.0/iiif/chronoscope/sanborn01802_004.keymap.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Collinsville, Illinois | 1915 | key map | mapsnap generated fit (2026-10-19)","creator":{"type":"Software","name":"mapsnap","homepage":"https://mapsnap.org"},"rights":"https://opendatacommons.org/licenses/odbl/1-0/","metadata":[{"label":"generated","value":"2026-10-19"},{"label":"run","value":"corpus-v2"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g018021915:01802_1915-0001__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Collinsville, Illinois | 1915 | sanborn01802_004 p1 [2]","metadata":[{"label":"streets","value":"82"},{"label":"intersections","value":"120"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6878.4"},{"label":"split_canvas_h","value":"8074.1"}],"created":"2026-10-19T14:54:06Z","modified":"2026-10-19T14:54:06Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g018021915:01802_1915-0001__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g018021915:01802_1915-0001","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"0.0,0.0 0.0,1361.5 650.0,1366.9 652.1,1127.2 895.9,1129.5 893.9,1369.0 1056.0,1370.5 1055.8,1386.3 1050.5,1913 1613,1913 1613,1396.2 1613,1376.0 1613,0.0 0.0,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g018021915:01802_1915-0001__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[204.8,744.4],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-89.998612,38.668956]}},{"type":"Feature","properties":{"resourceCoords":[755.5,374.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-89.9800417,38.6787189]}}]}}]}